JP5891098B2 - Ultrasonic diagnostic apparatus and method for operating ultrasonic diagnostic apparatus - Google Patents

Description

  The present invention relates to an ultrasonic diagnostic apparatus and an ultrasonic image display method, and more particularly to an ultrasonic diagnostic apparatus and an ultrasonic image display method for displaying a puncture guideline superimposed on an ultrasonic image.

  Conventionally, in the medical field, an ultrasonic diagnostic apparatus using an ultrasonic image has been put into practical use. In general, this type of ultrasonic diagnostic apparatus has an ultrasonic probe with an array transducer built therein and an apparatus main body connected to the ultrasonic probe. An ultrasonic image is generated by transmitting an ultrasonic wave toward the object, receiving an ultrasonic echo from the subject with an ultrasonic probe, and electrically processing the received signal with the apparatus main body.

In recent years, an ultrasonic diagnostic apparatus is also used when performing biopsy or the like by collecting a specific biological tissue by inserting a puncture needle into a subject. In this ultrasonic diagnostic apparatus, by transmitting and receiving an ultrasonic beam from the ultrasonic probe toward the subject, while confirming the movement of the puncture needle in the subject with the ultrasonic image displayed on the display unit The puncture needle is advanced to the target biological tissue. In addition, a puncture guideline for guiding the puncture needle from the surface of the subject to the target biological tissue is superimposed on the ultrasonic image on the display unit, and the puncture guideline indicates that the puncture needle reaches the target biological tissue. Can be supported. However, in the ultrasonic image, the puncture needle is buried in the surrounding biological tissue, and it is difficult to clearly confirm the position.
Therefore, as a technique for clearly displaying the position of the puncture needle in the ultrasonic image, for example, as disclosed in Patent Document 1, the ultrasonic image is divided into a region including the puncture guideline and a region other than that. It has been proposed to perform image processing such as narrowing the dynamic range for an area including puncture guidelines. In the ultrasonic diagnostic apparatus described in Patent Document 1, since the puncture needle is emphasized by performing image processing on a region including the puncture guideline of the ultrasonic image, the position of the puncture needle can be clarified.

JP 2007-195867 A

Furthermore, there is a problem that the puncture needle and the target biological tissue may overlap with the puncture guideline, which makes it difficult to confirm the positions in detail. Therefore, after the real-time ultrasonic image B displayed on the display unit 21 is once frozen as shown in FIG. 8A, the puncture that was superimposed on the ultrasonic image as shown in FIG. An ultrasonic diagnostic apparatus has been developed in which the positions of the puncture needle N and the living tissue T can be confirmed in detail by hiding the guideline G.
However, when returning from the freeze operation to the live operation for displaying the real-time ultrasound image B and continuing the puncture, the puncture guideline G is not displayed, so the operation for displaying the puncture guideline G must be performed again. Therefore, it was difficult to smoothly switch from the freeze operation to the live operation and continue the puncture. For this reason, when switching between the live operation and the freeze operation many times while maintaining the puncture state, such as changing the angle of the puncture needle N little by little while switching between the freeze operation and the live operation, return to the live operation. The display operation of the puncture guideline G must be performed every time, and there is a possibility that the puncture may be hindered.

  The present invention has been made to solve such a conventional problem, and provides an ultrasonic diagnostic apparatus and an ultrasonic image display method capable of performing puncture while smoothly switching from a freeze operation to a live operation. For the purpose.

  The ultrasonic diagnostic apparatus according to the present invention selects either a live operation for superimposing and displaying a puncture guideline on a real-time ultrasonic image or a freeze operation for reproducing an ultrasonic image of a predetermined frame according to an operation by an operator. In the ultrasonic diagnostic apparatus to be executed, when the non-display of the puncture guideline is instructed by the operation unit that inputs a command from the operator and the operation unit during the freeze operation, the puncture guideline that is displayed superimposed on the ultrasonic image And a control unit that automatically restores the puncture guideline that has been erased and superimposes it on a real-time ultrasonic image when the freeze operation returns to the live operation.

  Here, if the non-display of the puncture guideline is instructed by the operation unit during the freeze operation, the control unit can erase all of the puncture guideline displayed superimposed on the ultrasonic image. In addition, when the control unit is instructed to hide the puncture guideline during the freeze operation, the control unit can erase only a part of the puncture guideline that is superimposed and displayed at the center of the ultrasonic image. .

  Further, when the operation unit is instructed to hide the puncture guideline during the freeze operation, the control unit can reproduce the ultrasonic image of the previous frame for a predetermined time. In addition, when the control unit is instructed to hide the puncture guideline during the freeze operation, the control unit can also loop-reproduce a plurality of frames of ultrasonic images over a predetermined time range.

Further, it is preferable to further include an image memory for storing an ultrasonic image in which at least a part of the puncture guideline is erased by a command from the operation unit during the freeze operation.
In addition, when the live operation is switched to the freeze operation, the control unit can automatically change the display color of the puncture guideline.
Further, the puncture guideline can be superimposed and displayed on the ultrasound image at any angle of 48 degrees, 60 degrees, and 90 degrees. The angle of the puncture guideline is not limited to the above angle, and can be changed according to the puncture attachment. In addition, when performing puncturing without using a puncture attachment, the operator can arbitrarily set the angle of the puncture guideline.

  The ultrasonic image display method according to the present invention selects either a live operation for superimposing and displaying a puncture guideline on a real-time ultrasonic image or a freeze operation for reproducing an ultrasonic image of a predetermined frame according to an operator's operation. In the ultrasonic image display method to be executed, when an instruction from the operator is input and the non-display of the puncture guideline is instructed by the operator during the freeze operation, at least one of the puncture guideline superimposed on the ultrasonic image is displayed. When the part is erased and the freeze operation is returned to the live operation, the erased puncture guideline is automatically restored and superimposed on a real-time ultrasonic image.

  According to the present invention, when the freeze operation is returned to the live operation, the puncture guidelines that have been deleted are automatically restored and superimposed on the real-time ultrasonic image, so that the puncture can be smoothly switched from the freeze operation to the live operation. Can be performed.

1 is a block diagram showing a configuration of an ultrasonic diagnostic apparatus according to Embodiment 1 of the present invention. It is a figure which shows the ultrasonic image displayed on the display part. It is a figure which shows the mode of the ultrasonic image displayed on a display part, when it switches to live operation or freeze operation, respectively. FIG. 10 is a diagram showing puncture guidelines displayed in a modification of the first embodiment. In Embodiment 2, it is a figure which shows the mode of the ultrasonic image displayed on a display part when it switches from live operation to freeze operation. In the modification of Embodiment 2, it is a figure which shows the mode of the ultrasonic image displayed on a display part when it switches from live operation to freeze operation. It is a figure which shows the puncture guideline displayed in the modification of Embodiment 1 and 2. FIG. In a prior art example, it is a figure which shows the mode of the ultrasonic image displayed on a display part, when it returns from freezing operation | movement to live operation | movement.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1
FIG. 1 shows the configuration of an ultrasonic diagnostic apparatus according to Embodiment 1 of the present invention. The ultrasonic diagnostic apparatus includes an ultrasonic probe 1 and a diagnostic apparatus main body 2 connected to the ultrasonic probe 1.
The ultrasonic probe 1 has an array transducer 3 that transmits and receives ultrasonic waves, and a transmission circuit 4 and a reception circuit 5 are connected to the array transducer 3, respectively. A probe control unit 6 is connected to the transmission circuit 4 and the reception circuit 5.

The diagnostic apparatus body 2 has a signal processing unit 7 connected to the receiving circuit 5 of the ultrasonic probe 1, and the signal processing unit 7 includes a DSC (Digital Scan Converter) 8, an image processing unit 9, and a display control unit. 10 and the display unit 11 are sequentially connected. An image memory 12 is connected to the image processing unit 9.
A main body control unit 13 is connected to the signal processing unit 7, DSC 8, and display control unit 9. An operation unit 14 and a storage unit 15 are connected to the main body control unit 13. In addition, the probe control unit 6 of the ultrasonic probe 1 and the main body control unit 13 of the diagnostic apparatus main body 2 are connected to each other.

  The array transducer 3 of the ultrasonic probe 1 has a plurality of ultrasonic transducers arranged one-dimensionally or two-dimensionally. Each of these ultrasonic transducers transmits an ultrasonic wave according to a drive signal supplied from the transmission circuit 4 and receives an ultrasonic echo from the subject to output a reception signal. Each ultrasonic transducer is, for example, a piezoelectric ceramic represented by PZT (lead zirconate titanate), a polymer piezoelectric element represented by PVDF (polyvinylidene fluoride), or PMN-PT (magnesium niobate / lead titanate). It is constituted by a vibrator in which electrodes are formed on both ends of a piezoelectric body made of a piezoelectric single crystal represented by a solid solution).

  When a pulsed or continuous wave voltage is applied to the electrodes of such a vibrator, the piezoelectric body expands and contracts, and pulsed or continuous wave ultrasonic waves are generated from the respective vibrators, and the synthesis of those ultrasonic waves. As a result, an ultrasonic beam is formed. In addition, each transducer generates an electric signal by expanding and contracting by receiving propagating ultrasonic waves, and these electric signals are output as ultrasonic reception signals.

  The transmission circuit 4 includes, for example, a plurality of pulsers, and is transmitted from the plurality of ultrasonic transducers of the array transducer 3 based on the transmission delay pattern selected according to the control signal from the probe control unit 6. The delay amount of each drive signal is adjusted so that the ultrasonic wave forms an ultrasonic beam and is supplied to a plurality of ultrasonic transducers.

The reception circuit 5 amplifies the reception signal transmitted from each ultrasonic transducer of the array transducer 3 and performs A / D conversion, and then follows the reception delay pattern selected according to the control signal from the probe control unit 6. The reception focus processing is performed by adding the respective delays to each reception signal. By this reception focus processing, reception data (sound ray signal) in which the focus of the ultrasonic echo is narrowed is generated.
The probe control unit 6 controls each part of the ultrasonic probe 1 based on various control signals transmitted from the main body control unit 13 of the diagnostic apparatus main body 2.

The signal processing unit 7 of the diagnostic apparatus main body 2 corrects the attenuation by the distance according to the depth of the reflection position of the ultrasonic wave on the reception data generated by the reception circuit 5 of the ultrasonic probe 1, By performing the envelope detection process, a B-mode image signal that is tomographic image information related to the tissue in the subject is generated.
The DSC 8 converts (raster conversion) the B-mode image signal generated by the signal processing unit 7 into an image signal according to a normal television signal scanning method.
The image processing unit 9 performs various necessary image processing such as gradation processing on the B-mode image signal input from the DSC 8, and then outputs the B-mode image signal to the display control unit 7 or stores it in the image memory 12. Store. As a result, real-time ultrasonic images are sequentially stored in the image memory 12. The image memory 12 can also newly store an ultrasonic image of a predetermined frame selected by the operator from the sequentially stored ultrasonic images.
These signal processing unit 7, DSC 8, image processing unit 9 and image memory 12 form an image generation unit 16.

The display control unit 10 causes the display unit 11 to display an ultrasonic image based on the B-mode image signal that has been subjected to image processing by the image processing unit 9.
The display unit 11 includes a display device such as an LCD, for example, and displays an ultrasonic image under the control of the display control unit 10.

  The main body control unit 13 controls each part of the ultrasonic diagnostic apparatus based on a command input from the operation unit 14 by the operator. Further, the main body control unit 13 superimposes and displays the puncture guideline for guiding the puncture needle inserted into the subject to the target living tissue on the ultrasonic image displayed on the display unit 11.

The operation unit 14 is for inputting a command from an operator, and can be formed from a keyboard, a mouse, a trackball, a touch panel, or the like. For example, an operation selection button for selecting one of a live operation for displaying a real-time ultrasonic image and a freeze operation for reproducing an ultrasonic image of a predetermined frame, and a puncture guideline superimposed on the ultrasonic image are deleted. A guideline erasing button, a save button for selecting an ultrasonic image of a predetermined frame and saving it in the image memory 12 can be provided.
The storage unit 15 stores an operation program and the like. The storage unit 15 stores a hard disk, a flexible disk, an MO, an MT, a RAM, a CD-ROM, a DVD-ROM, an SD card, a CF card, a USB memory, or a recording medium or a server. Can be used.
The signal processing unit 7, the DSC 8, the image processing unit 9, the display control unit 10, and the main body control unit 13 are composed of a CPU and an operation program for causing the CPU to perform various processes. You may comprise.

FIG. 2 illustrates an ultrasonic image displayed on the display unit 11.
On the display unit 11, an ultrasound image B obtained by transmitting and receiving ultrasound from the ultrasound probe 1 is displayed, and a puncture guideline G is displayed superimposed on the ultrasound image B.
The puncture guideline G extends to a specific living tissue T in the subject and serves as a guide when the puncture needle N is inserted into the subject. For example, the puncture guideline G is attached to the ultrasound probe 1. The position and angle are preset according to the puncture needle attachment 17. The puncture needle attachment 17 fixes the insertion position P and the insertion angle R of the puncture needle N with respect to the ultrasonic probe 1, and is set at a depth position of a specific living tissue T in the subject. It is appropriately selected and used accordingly. Thus, since the puncture direction from the puncture position P to the living tissue T is determined by the puncture needle attachment 17, the position and angle of the puncture guideline G can be set in advance according to the puncture needle attachment 17. it can.
In addition, a probe direction mark E indicating the direction of the ultrasonic probe 1 is displayed on the display unit 11. Furthermore, a scale S indicating the depth and width of the ultrasound image B is displayed on the display unit 11 and a focus sign M indicating the depth of focus is displayed.

Next, the operation of the first embodiment will be described.
First, the ultrasonic probe 1 is placed at a predetermined position on the subject surface, and the operator operates the operation selection button of the operation unit 14 to puncture the real-time ultrasonic image B displayed on the display unit 11. A live operation for displaying the guideline G in a superimposed manner is selected.
When a live operation is selected by the operator, an ultrasonic beam is transmitted from the array transducer 3 of the ultrasonic probe 1 disposed on the surface of the subject, and the array transducer 3 that has received an ultrasonic echo from within the subject. The reception signal is output to the reception circuit 5 to generate reception data. Subsequently, the reception data is output from the reception circuit 5 to the image generation unit 16 of the diagnostic apparatus body 2 to generate an ultrasonic image. The ultrasonic images generated in this way are sequentially stored in the image memory 12 in the image generation unit 16 and displayed on the display unit 11 by the display control unit 10.

On the other hand, as shown in FIG. 2, a puncture needle attachment 17 corresponding to the position of a specific living tissue T in the subject is attached to the ultrasound probe 1. The type of the puncture needle attachment 17 attached to the ultrasonic probe 1 is input to the main body control unit 13 of the diagnostic apparatus main body 2 by the operator via the operation unit 14. In the main body control unit 13, a puncture guideline G for guiding the puncture needle N from the insertion position P to the living tissue T is set in advance according to the puncture needle attachment 17. A puncture guideline G extending from the position P to the living tissue T is displayed superimposed on the ultrasonic image B.
As a result, as shown in FIG. 3A, the puncture guideline G is superimposed on the real-time ultrasonic image B and displayed on the display unit 11. In addition, ultrasonic image data D is sequentially stored in the image memory 12, and the display unit 11 indicates the display position indicator F indicating the storage position of the ultrasonic image data D displayed on the display unit 11. The latest ultrasonic image stored in the image memory 12 is displayed.

Subsequently, the operator inserts the puncture needle N into the subject along the puncture needle attachment 17 attached to the ultrasonic probe 1, and inserts the puncture needle N according to the puncture guideline G displayed on the display unit 11. Proceed into the subject. Thus, by advancing the puncture needle N according to the puncture guideline G, the puncture needle N can easily reach the living tissue T. At this time, the operator selects the freeze operation using the operation selection button of the operation unit 14, for example, when the state where the puncture needle N has reached a specific living tissue T is stored as an image.
When an instruction for a freeze operation by an operator is input to the main body control unit 13 via the operation unit 14, the main body control unit 13 controls the display control unit 10 to cause the freeze operation as shown in FIG. The ultrasonic image B of the frame at the timing when is selected is displayed on the display unit 11.

Further, when the portion where the specific biological tissue T is punctured with the puncture needle N overlaps the puncture guideline G, the operator operates the guideline erasure button of the operation unit 14 as shown in FIG. In addition, the puncture guideline G superimposed on the ultrasonic image B is deleted, and only the ultrasonic image B is displayed. As a result, the portion superimposed on the puncture guideline G can be clearly displayed, and the operator has conventionally confirmed that the puncture guideline G is buried in the puncture guideline G, such as the insertion direction of the puncture needle N into the living tissue T. It can be made easier to check. For example, when a therapeutic drug is administered to the living tissue T via the puncture needle N, the spread of the drug administered from the puncture needle N is conventionally buried in the puncture guideline G, and it has been difficult to confirm. In this invention, it can make it easy to confirm.
When the operator wants to save the ultrasonic image B of the frame confirmed by the freeze operation, the operator operates the save button of the operation unit 14 to display the ultrasonic image B with the puncture guideline G deleted. It can be newly stored in the memory 12. Thereby, an ultrasonic image B of an important frame in a series of punctures can be stored in a state where the puncture guideline G is erased, and after the ultrasonic diagnosis is completed, how the puncture needle N reaches the living tissue T The treatment state at that time can be confirmed only by the ultrasound image B.

When puncturing is continued after the state of puncturing is saved in this way, the operator returns to the live operation from the freeze operation by operating the operation selection button of the operation unit 14. That is, when a live motion command from the operator is input to the main body control unit 13 via the operation unit 14, the main body control unit 13 controls the display control unit 10 to obtain the display as shown in FIG. The real-time ultrasonic image B is displayed on the display unit 11 and the puncture guideline G that has been deleted is automatically restored and superimposed on the real-time ultrasonic image B.
In this way, when the live action is returned from the freeze operation, the erased puncture guideline G is automatically restored, so that the operator can perform puncture again according to the puncture guideline G without being disturbed by the display operation of the puncture guideline G. You can continue. For example, even when switching between live action and freeze action is repeated multiple times, the puncture guideline G is automatically displayed every time the live action is resumed, so that it is possible to return to the original live action with a few steps. The puncture can be continued by smoothly switching from live to live operation.

In the above embodiment, when non-display of the puncture guideline G is instructed by the operation unit 14 during the freeze operation, all of the puncture guideline G superimposed on the ultrasonic image B is erased. It is not limited to this as long as a part of the puncture guideline G is deleted so that the puncture needle N and the living tissue T can be confirmed. For example, as shown in FIG. 4, when non-display of the puncture guideline G is instructed by the operation unit 14 during the freeze operation, only a part of the puncture guideline G that is superimposed and displayed on the central portion of the ultrasound image B is displayed. Can be erased.
Thereby, the living tissue T and the puncture needle N located in the center of the ultrasonic image B are clearly displayed, and information from the puncture guideline G such as the insertion direction of the puncture needle N can be obtained. The ultrasonic image B is stored in the image memory 12, and the operator confirms the positions of the puncture needle N and the living tissue T in detail.

  The main body control unit 13 can automatically change the display color of the puncture guideline G superimposed on the ultrasonic image B when the operator switches from the live operation to the freeze operation. Accordingly, the operator can determine the current operation only by looking at the display color of the puncture guideline G displayed on the display unit 11, and can prevent an erroneous operation such as inserting the puncture needle N during the freeze operation. it can.

Embodiment 2
In the first embodiment, when the operator switches from the live operation to the freeze operation using the operation selection button of the operation unit 14, there may be a deviation in the switching timing. For example, when the operator instructs another person to switch to the freeze operation, there is a difference between when the operator gives an instruction and when the operation unit 14 is actually operated, or the operator operates after viewing the ultrasonic image. Deviation occurs until the unit 14 is actually operated. As described above, when the switching timing is deviated and the desired ultrasonic image B is not displayed on the display unit 11, the position of the display position indicator F shown in FIG. 3B is adjusted, for example. Thus, a desired ultrasonic image B can be displayed on the display unit 11.

Furthermore, the desired ultrasonic image B can be automatically displayed on the display unit 11 by setting the time C for which the switching timing is shifted in advance in the main body control unit 13.
For example, as shown in FIG. 5A, after the operator switches from the live operation to the freeze operation by the operation selection button of the operation unit 14, the operator deletes the guide line of the operation unit 14 as shown in FIG. The puncture guideline G superimposed on the ultrasonic image B is deleted by the button. At this time, the main body control unit 13 takes into account the timing shift when the operator switches to the freeze operation, and displays the ultrasonic image of the frame that is a predetermined time C before the timing when the operator switches to the freeze operation. Can be played.
Further, as shown in FIG. 6A, after switching from the live operation to the freeze operation by a command from the operation unit 14, as shown in FIG. 6B, the puncture guideline G is received by a command from the operation unit 14. Is erased. At this time, the main body control unit 13 performs loop reproduction of ultrasonic images of a plurality of frames over a predetermined time C range from the timing when the operator switches to the freeze operation in consideration of the timing shift when the operator switches to the freeze operation. It can also be made. Thereby, it is possible to easily select an ultrasonic image desired by the operator from a series of puncture flows that are reproduced in a loop.
In addition, when a drug is injected with the puncture needle N in order to treat the living tissue T, the spread of the drug being injected into the living tissue T is stored as a moving image, for example, for about 60 seconds, and then switched to the freeze operation. The operator can reconfirm the spread of the medicine by looping back the 60 seconds of the drug injection from the time of the drug injection (60 seconds) in addition to taking the deviation into consideration. Furthermore, a moving image of drug injection can be stored as it is.

  As described above, the display in consideration of the timing difference in which the operator operates the operation unit 14 can reduce the labor for searching for a desired ultrasonic image from the ultrasonic image data stored in the image memory 12. .

In the first and second embodiments, the insertion angle R of the puncture needle N inserted into the subject is preferably set in advance according to the type of the target biological tissue T. The insertion angle R of the puncture needle N can be set to 48 degrees, 60 degrees, and 90 degrees, for example. When the insertion angle R is 48 degrees, the puncture guideline G is superimposed and displayed on the ultrasonic image B at an angle of 48 degrees as shown in FIG. When the insertion angle R is 60 degrees, the puncture guideline G is superimposed and displayed on the ultrasound image B at an angle of 60 degrees as shown in FIG. Further, when the insertion angle R is 90 degrees, the puncture guideline G is superimposed and displayed on the ultrasonic image B at an angle of 90 degrees as shown in FIG.
Thus, by setting the puncture angle R of the puncture needle N in advance according to the type of the biological tissue T, it is possible to reduce the labor when the operator sets the puncture angle R and the puncture guideline G. it can.
The insertion angle R and insertion position P of the puncture needle N can be arbitrarily set by the operator, and the puncture guideline G is superimposed on the ultrasonic image B based on the set value.

  DESCRIPTION OF SYMBOLS 1 Ultrasonic probe, 2 Diagnostic apparatus main body, 3 Array transducer, 4 Transmission circuit, 5 Reception circuit, 6 Probe control part, 7 Signal processing part, 8 DSC, 9 Image processing part, 10 Display control part, 11 Display unit, 12 image memory, 13 body control unit, 14 operation unit, 15 storage unit, 16 image generation unit, 17 puncture needle attachment, B ultrasound image, G puncture guideline, T biological tissue, N puncture needle, P puncture Position, R Insertion angle, E Probe direction mark, S scale, M focus mark, D ultrasound image data, F display position mark, C Time when timing deviation occurred.

Claims (10)

In an ultrasonic diagnostic apparatus that selects and executes either a live operation for superimposing and displaying a puncture guideline on a real-time ultrasonic image or a freeze operation for reproducing an ultrasonic image of a predetermined frame according to an operation by an operator,
An operation unit for inputting commands from an operator;
When non-display of the puncture guideline is instructed by the operation unit during the freeze operation, only a part of the puncture guideline superimposed on the ultrasonic image is deleted, and when it is returned from the freeze operation to the live operation, it is deleted. An ultrasonic diagnostic apparatus comprising: a control unit that automatically restores the puncture guideline that has been placed and displays it superimposed on a real-time ultrasonic image.   The ultrasonic diagnostic apparatus according to claim 1, wherein the control unit reproduces an ultrasonic image of a previous frame for a predetermined time when the operation unit is instructed to hide the puncture guideline during a freeze operation.   2. The ultrasonic diagnostic apparatus according to claim 1, wherein, when the operation unit is instructed to hide the puncture guideline during a freeze operation, the control unit causes a plurality of frames of ultrasonic images over a predetermined time range to be loop-reproduced. In an ultrasonic diagnostic apparatus that selects and executes either a live operation for superimposing and displaying a puncture guideline on a real-time ultrasonic image or a freeze operation for reproducing an ultrasonic image of a predetermined frame according to an operation by an operator,
An operation unit for inputting commands from an operator;
When non-display of the puncture guideline is instructed by the operation unit during the freeze operation, at least a part of the puncture guideline superimposed on the ultrasonic image is deleted, and when it is returned from the freeze operation to the live operation, it is deleted. A control unit that automatically restores the puncture guideline and superimposes it on a real-time ultrasound image,
The ultrasound diagnostic apparatus, wherein the controller reproduces an ultrasound image of a previous frame by a predetermined time when the operation unit instructs to hide the puncture guideline during a freeze operation.   The ultrasonic diagnostic apparatus according to claim 4, wherein when the non-display of the puncture guideline is instructed by the operation unit during the freeze operation, the control unit deletes all of the puncture guideline displayed superimposed on the ultrasonic image. In an ultrasonic diagnostic apparatus that selects and executes either a live operation for superimposing and displaying a puncture guideline on a real-time ultrasonic image or a freeze operation for reproducing an ultrasonic image of a predetermined frame according to an operation by an operator,
An operation unit for inputting commands from an operator;
When non-display of the puncture guideline is instructed by the operation unit during the freeze operation, at least a part of the puncture guideline superimposed on the ultrasonic image is deleted, and when it is returned from the freeze operation to the live operation, it is deleted. A control unit that automatically restores the puncture guideline and superimposes it on a real-time ultrasound image,
The ultrasonic diagnostic apparatus according to claim 1, wherein when the operation unit is instructed to hide the puncture guideline during a freeze operation, the control unit loop-reproduces a plurality of frames of ultrasonic images over a predetermined time range.   The ultrasonic diagnostic apparatus according to claim 6, wherein when the non-display of the puncture guideline is instructed by the operation unit during the freeze operation, the control unit erases all of the puncture guideline displayed superimposed on the ultrasonic image.   The ultrasonic diagnostic apparatus according to any one of claims 1 to 7, further comprising an image memory that stores an ultrasonic image in which at least a part of the puncture guideline is erased by a command from the operation unit during a freeze operation. .   The ultrasonic diagnostic apparatus according to any one of claims 1 to 8, wherein the control unit automatically changes a display color of the puncture guideline when the live operation is switched to the freeze operation. An operation method of an ultrasonic diagnostic apparatus that selects and executes either a live operation for displaying a puncture guideline superimposed on a real-time ultrasonic image or a freeze operation for reproducing an ultrasonic image of a predetermined frame according to an operation of an operator In
The ultrasonic diagnostic apparatus includes an operation unit that instructs display and non-display of a puncture guideline,
In accordance with a command from the operation unit, a control unit that switches between display and non-display of the puncture guideline,
When the control unit is instructed to hide the puncture guideline from the operation unit during the freeze operation, only a part of the puncture guideline superimposed on the ultrasonic image is erased, and the freeze operation is changed to the live operation. A method of operating an ultrasonic diagnostic apparatus, wherein when the puncture guideline is restored, the puncture guideline that has been erased is automatically restored and superimposed on a real-time ultrasonic image.

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